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. 2014 Jul 14;5:1031–1041. doi: 10.3762/bjnano.5.116

Figure 3.

Figure 3

Traction forces of male beetles Coccinella septempunctata (a) and pull-off forces of PDMS semi-spheres (b) on different surfaces. According to the t-test and Mann–Whitney rank sum test (Table 3 and Table 4), means/medians with different letters differ significantly from each other.